space between textView and keyboard - swift

Question

I am facing an issue, whenever I going to type in ALTextInputBar() there is a space between keyboard and ALTextInputBar() of 44 points. I don't know from where it is coming. Please have a look on code and image.
#IBOutlet weak var viewChatBox: UIView!
#IBOutlet weak var viewChatBoxBottomConstraint: NSLayoutConstraint!
let textInputBar = ALTextInputBar()
let keyboardObserver = ALKeyboardObservingView()
override func viewDidLoad() {
super.viewDidLoad()
IQKeyboardManager.shared.enable = false
IQKeyboardManager.shared.enableAutoToolbar = false
configureView()
NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillChangeFrame), name: UIResponder.keyboardWillChangeFrameNotification, object: nil)
}
override func viewDidLayoutSubviews() {
super.viewDidLayoutSubviews()
if #available(iOS 11, *) {
// safe area constraints already set
}
else {
if (!(self.topLayoutConstraint != nil)) {
topLayoutConstraint = viewTopBar.topAnchor.constraint(equalTo: topLayoutGuide.bottomAnchor)
self.topLayoutConstraint?.isActive = true
}
if (!(self.bottomLayoutConstraint != nil)) {
// bottomLayoutConstraint = viewChatBox.bottomAnchor.constraint(equalTo: bottomLayoutGuide.topAnchor)
self.bottomLayoutConstraint?.isActive = true
}
}
}
func configureInputBar () {
btnChat = UIButton(frame: CGRect(x: 0, y: 0, width: 36, height: 36))
keyboardObserver.isUserInteractionEnabled = false
textInputBar.showTextViewBorder = true
textInputBar.leftView = nil
textInputBar.rightView = btnChat
textInputBar.alwaysShowRightButton = true
textInputBar.delegate = self
textInputBar.textView.autocorrectionType = .yes
textInputBar.backgroundColor = UIColor(white: 0.95, alpha: 1)
textInputBar.keyboardObserver = keyboardObserver
viewChatBox.addSubview(textInputBar)
applyConstraintToChatBox()
self.view.layoutIfNeeded()
}
func applyConstraintToChatBox() {
textInputBar.translatesAutoresizingMaskIntoConstraints = false
viewChatBox.translatesAutoresizingMaskIntoConstraints = false
let views = ["textView": textInputBar]
let hConstraints = NSLayoutConstraint.constraints(withVisualFormat: "H:|-0-[textView]-0-|", options: [], metrics: nil, views: views)
let vConstraints = NSLayoutConstraint.constraints(withVisualFormat: "V:|-0-[textView]-0-|", options: [], metrics: nil, views: views)
viewChatBox.addConstraints(hConstraints)
viewChatBox.addConstraints(vConstraints)
}
override var inputAccessoryView: UIView? {
get {
return keyboardObserver
}
}
override var canBecomeFirstResponder: Bool {
return true
}
//MARK: - TEXTVIEW DELEGATE
func textView(textView: ALTextView, shouldChangeTextInRange range: NSRange, replacementText text: String) -> Bool {
if (textInputBar.text.count == 0) {
return true
}
let newLength = textInputBar.text.count + text.count - range.length
return (newLength <= 144);
}
func inputBarDidChangeHeight(height: CGFloat) {
UIView.animate(withDuration: 0.3, delay: 0.0, usingSpringWithDamping: 0.7, initialSpringVelocity: 0.7, options: [.curveLinear], animations: { () -> Void in
self.view.layoutIfNeeded()
}, completion: nil)
}
// MARK: - KEYBOARDS
#objc func keyboardWillChangeFrame(notification: Notification) {
let endFrame = ((notification as NSNotification).userInfo![UIResponder.keyboardFrameEndUserInfoKey] as! NSValue).cgRectValue
viewChatBoxBottomConstraint.constant = view.bounds.height - endFrame.origin.y
print("CHAT BOX FRAME: \(viewChatBox.frame)")
print("TEXT FRAME FRAME: \(textInputBar.frame)")
self.view.layoutIfNeeded()
}

Answer 1

Late answer but may help someone. I had the same issue and found this below code in the documentation.
Only helpful for IQKeyboardManager users.
IQKeyboardManager
self.textField.keyboardDistanceFromTextField = 8; //This will modify default distance between textField and keyboard. For exact value, please manually check how far your textField from the bottom of the page. Mine was 8pt.